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Well, he is just deeply narcissistic and looks for validation, like you say.

I don't know, if there will ever be a moment, that he thinks he's successful enough to earn love.

But he is also an adult. And even though he has his emotional problems, he is a very shitty parent to his trans child. And just forwarding all the hate, because he can't handle his feelings isn't acceptable.
He still has a shitload of money and just with that enough power to move things.

Which is dangerous, when he can influence geo politics that much - see StarLink in war or near war scenarios, and just recently the US election.

I actually would really like to know, why he is feeling so insecure and needs all this validation, and with what success he would say, that's it, now I'm fine.